Device for packing drive shafts of hot oil pumps



March 22, 1932. D s s E 1,850,614

DEVICE FOR PACKING DRIVE SHAFTS OF HOT OIL PUMPS Filed Jan. 4, 1930 2Sheets-Sheet l INVENTOR McHaEL 7. fi/ss/vsrfiw ATTORNEY M. D. AISENSTEINDEVICE FOR PACKING DRIVE SHAFTS OF HOT OIL PUMPS March 22, 1932.

Filed Jan. 4, 1930 2 Sheets-Sheet 2 INVENTOR Mich HE]. D. fi/ss/vsn-v/vBY WAT/[DEWEY 2 Patented Mar. 22, 1932 UNITED STATES PATENT orrlciMICHAEL D. AISENSTEIN,.OF BERKELEY, CALIFORNIA, ASSIGNOR TO UNITED IRONWORKS, OFv OAKLAND, CALIFORNIA, A CORPORATION vOFvGAIJLIEORNI A DEVICEFOR PACKING DRIVE SHAFTS OF HOTOIL PUMPS Application filed January 4,1939. Serial No. 418,535.

This invention relates to a new and useful device for packing pumps andespecially re lates to an improved method for packing drive shafts ofhotoil pumps so that the escapingof hot oil and gas past the packing tothe airwhere it can flash will be'positive- 1y eliminated. A

In pumps that are used for pumping hot oils and gasoline, it is a verydiflicult problem to pack the packing box, where the shaft enters thepump,'in such a manner as to positively prevent any leakage of gas andoil. It is not only very important, but is absolutelynecessaryrtoprevent any hot oil or 'gas, whatever, from leaking past thepacking and coming in contact with the air, when it is hot, due to thefact that oils having excessively high temperatures will immediatelyflash into flame the moment they come in contact with the air, causingmuch troubleand resulting in much serious danger. Different devices havebeen provided and various methods used to eliminate this trouble, all ofwhich have certain disadvantages. The providing of a flame shield aroundthe packing gland is impractical dueto the fact that the shield must beremoved each time it is necessary to re-pack the pump shaft, and also,due to the fact that the shield will not prevent the hot oil fromflashing but is merely a means to confine the flame and'does notpositively eliminate the danger.

It is therefore an object of the present invention to improve thepresent devices and methods used for packing hot oil pumps by providingpositive means to reduce the temperature of any escaping oil and whichwill absorb the gases thereof and to also provide means that willexclude air atatmospheric pressure from around the packing box and glandand thus positively prevent any hot oil from coming in contact' with theair and thereby positively prevent any and all possibility of the hotoil flashing.

In other words, it is an object of the present invention not merely toprovide means to confine the flame caused by the hot oil flashing andthus reduce the danger, butit is an object to provide means that willactually prevent the flashing and therebynot merely reduce the danger,but positively eliminate the cause.

To be more specific, it is one of the ob-' jects of the presentinvention to reduce the temperature of the hot oil, that, leaks past thepacking, by providing a ring between the sections of the packing thatwill form a chamber thereinwhich will catch the escapinghot oil, and to.convey cold oil through said chamber and thereby reduce the temperatureof the escaping hot oil and'also absorb the gases thereform, thuseliminating much danger caused by the'hot oil flashing when it comes incontact with air. i

It is another object of the invention to completely enclose the packingbox and gland in a chamber and to supply-said chamber withnon-inflammable gases or any suitable fluid andthus exclude the air fromaround the gland and packing box. i

It is another ob iect of the invention to provide an improved mechanismfor operating and controlling the packing gland, the said mechanismincluding an improved form of packing gland'and means for guiding sameand an especially constructed internally threaded worm wheel operated bya screw within the chamber, the said screw being controlled by ahand-wheel outsideof the chamber;

It is a further object of the invention to construct and arrange thepacking gland and mechanism for controllingsame in such a manner thatthey may be quickly dismantled, and to provide openings withcoverwplates thereon, in" the packing gland chamber, so that'the'packing box may be quickly repacked without removing the chamber ordisturbing any of the bearings or working parts of the pump. z

The invention possesses other objects and features of advantage, some ofwhich, with the foregoing, will be made manifest in the followingdescription of the preferred form of the invention that is illustratedin the drawings accompanying and forming part of the specification.

It is to be understood that it is not intended to limit the invention tothe embodiment shown by said drawings and description, as variations maybe adaptedv within the scope of the invention as set forth in theclaims.

In the accompanying drawings:

Figure 1 is a central longitudinal sectional view of one end of a pumpwith the drive shaft extending therefrom, and shows the packing glandenclosed within a chamber and the preferred construction and arrangementof the parts involved in the invention.

Figure 2 is an end sectional view taken on line A -A of Figure 1',looking'in direction of the arrows.

Figure 3 is a side elevational view of the packing box and gland chamberwith the cover plate removed.

Figure 4 isaperspective view of a preferred form of packing gland usedin the invention.

Figure 5- is a perspective view of a preferred form of the adjustingworm wheel used in the invention.

Figure 6 is a longitudinal partial sectional view of the worm wheelscrew assembly.

Figure 7 is a perspective view of one type of ring that is mountedbetween the packing sections to form the chamber that is connected to.the cold oil supply.

Referring in detail to the different parts wherein like referencenumerals designate corresponding parts throughout the severalviiewmthenumeral 9 designates one end of an ordinary standard: pumpcasing and the numeral 10 designates a revolvable drive shaft thatextends therefrom. The numeral 9 may designate either the casing director the casing end cover that is fastened thereon. The numeral 12'designates an ordinary packing box that is provided on the casing or endcover; 14 a replaceable sleeve that is mounted on the shaft, and 15 oneof the hearings on which the shaft is supported. The packing gland 16 ispreferably split on a vertical plane and the two halves are held.together by bolts 1'Z' as shown in Figure 4. Studs or bolts 18 areprovided in the end of the packing box and are adapted to extend throughslots 19 are provided through the top and bottom ends of the packinggland flange to'pronerly guide the gland: and prevent it from. beingcircumferentially moved. The packing box and gland are completelyenclosed in a housing 20' that is fastened. to the casing. An opening21. having a cover thereon 22. is provided in each sideof the housingsothat the drii e shaft 10 may be quickly re-packed without removing thehousing 20 from the casing.

A preferred method to operate and control the packing gland 16 consistsin providing an especially constructed and internally threaded Wormwheel 23 and mounting the said worm Wheel on a threaded member 24 thatis fastened to the housing 20 as shown in Figure 1. The worm wheel has ahub portion that is provided with a circular projection or rim 25 thatis constructed to fit in arcshaped or circular grooves 26 that areprovided in the packing gland. The present construction shows aplurality of lips 27 provided on one end of the packing gland. Acomplete hub may be provided on the packing gland instead of the lipsifdesired and a complete circular groove cut in the said hub that willfit on the rim 25 that is provided on the hub portion: of the wormwheel. Revolvable movement is imparted to the worm wheel by means ofascrew 28 that is mounted in the housing 20 as shown in Figure 2 and itwill be seen that when the said worm Wheel is revolved, due to the factthat it is threaded on the member 24, it will move on the threadedmember either forward or backward according to which direction the screwis turned.

It is necessary to operate the screw from outside of the housing 20 andalso important to construct and arrange the parts so that they may bevery easily and quickly dismantled. Figure 6 shows the screw fixed on ashaft 29, the bottom end of which is supported on a bearing seat 30-within the housing 20 and the upper end extending outside of the housingand is provided with a hand- Wheel 31 as illustrated. The shaft issupported by another bearing 32 that is fastened to the top of thehousing 20. This bearing extends through an opening 20a that is providedin the top of the housing 20 and the said openingQOa has a diameter thatis greater than the outer diameter of the screw 28 so that when it isnecessary to remove the screw from the housing, the said bearing andscrew may be lifted out of said opening.

As hereinbefore stated, one of the objects of the present invention isto cool the hot oil that leaks along the drive shaft past the packing.In Figure 7 there is shown a ring 34 that is provided with a circulargroove 34a around both the outer and inner peripheries thereof and aplurality of holes or ports 35 that connect the grooves together. The

ring is mounted between the packing sections 36 as shown in Figure 1 andit will be seen that a chamber is formed around the shaft and betweenthe packing sections that will catch the hot oil as it leaks from thepump. A pipe 40 is provided through the top of the packing box and leadsto said ring and another pipe 37 is provided in the bottom of thepacking box and leads from said ring. When the pump is in operation andis pumping hot oil, cold oil is supplied through I the pipe 40 andpasses through the chamber any gas that forms from the hot oil. It is tobe understood that the present invention exists not merely in theconstruction and arrangement of the parts used to convey the cold oilbut rather in the application of cold oil around the drive shaft to coolthe hot oil that leaks along the drive shaft and absorb the gases thatform from the hot oil.

Another object of this invention is to exclude air from the housingchamber around the packing box and gland and thereby positively preventany and all possibility of any flashing of the gas should any pass bythe cold oil chamber in the packing box and escape out of the packingbox where it would flash into flame. To this end steam or noninflammablegas from any suitable source of supply is conveyed into the housingchamber through the pipe inlet 38 and is carried out of the said chamberthrough pipe outlet 39 and will thus continuously absorb any and all gasthat forms from the hot oil and escapes out of the packing box.

Having thus illustrated and described a certain form ofconstruction andarrangement of parts pertaining to the invention, it is to be understoodthat any suitable method may be used to cool the hotoil and absorb thegases that pass along a hot oil pump drive shaft, the presentconstruction and arrangement of parts not being utilized as indicatingthe only method that may be used, also that any suitable method may beused to continuously exclude air from around the packing gland and alsothat the parts provided to operate and control the packing gland may bemade in any suitable size or shape; and it is further desired to includein this a plication for Letters Patent of the United tates of America,any and all patentable novelty that exists in the invention disclosedand all that comes within the fundamental principle of the invention asset forth in the claims hereinafter mentioned.

What is claimed is:

1. A device for packing hot oil pump drive shafts, having incombination, a packing box surrounding the shaft; a grooved ring forforming a chamber around said shaft in the packing box; an inlet andoutlet leading transversely from the packing box and constructed toconvey cold oil through said ring and around said shaft; a housingforming a chamber around the packing box; a packing gland within saidchamber; means for adusting and controlling said packing gland outsideof said chamber; and an inlet and outlet for conveying non-inflammablefluid through said chamber.

2. A device for packing hot oil pump drive shafts, having incombination, a packing box surrounding the shaft; a grooved ring forforming aichamber around said shaft in the packing box; an inlet andoutlet leading transversely from the packing box and constructed toconvey cold oil through said ring and around said shaft; a housingforming a chamber around the packing box; an inlet and outlet in thehousing walls of said chamber; a vertically split packing gland mountedon said shaft within said chamber; means for adjusting and controllingsaid packing gland outside of said chamber; an opening in each lateralside wall of the chamber opposite the packing gland; and a cover platemounted over each opening and fastened detachably to thehousing.

3. A device for packing hot oil pump drive shafts, having incombination, a packing box surrounding the shaft; a grooved ring forforming a chamber around said shaft in the packing box; an inlet andoutlet leading transversely from the packing box and constructed toconvey cold oil through said ring and around said shaft; a housingforming a chamber around the packing box; an inlet and outlet in thehousing walls of said chamber; a split packing gland mounted on saidshaft within said chamber; an opening in-the wall of the chamberadjacent the packing gland; a cover plate for said opening; a threadedmember arranged around said shaft in said chamber and fastened to saidhousing; an internally threaded worm wheel mounted on said threadedmember and adapted to engage therewith; means for revolubly engaging theworm wheel with the packing gland; a screw revolubly supported in saidchamber and adapted to engage with said worm wheel and adjust thepacking gland; said screw having a shaft that extends outside of thechamber; and a handle provided on the outer end of said shaft to adjustthe packing gland from outside of the chamber.

4. A device for packing hot oil pump drive shafts, having incombination, a packing box surrounding the shaft; a grooved ring forforming a chamber around said shaft in the packing box; an inlet andoutlet leading transversely from the packing box and constructed toconvey cold oil through said ring and around said shaft; a housingforming a chamber around the packing box; an inlet and outlet in thehousing walls of said chamber; a split packing gland mounted on saidshaft within said chamber; an opening in the wall of the chamberadjacent the packing gland; a cover plate for said opening; a threadedmember arranged around said shaft in said chamber and fastened to saidhousing; an internally threaded worm wheel mounted on said threadedmember and adapted to engage therewith; said worm wheel andpackingvgland being engaged together by means its of acircular ridgedand grooved'joint; means for guiding the packing-gland to prevent itfrom being circumferentially moved; a; screw revolubly supported in saidchamber and adapted to engage with said worm wheel and adjust thepacking gland; said screw having a shaft that extends outside of thechamber; and a handleprovided on the outer end of said shaft to adjustthe packing gland from outside of the chamber.

In testimony that I claim the foregoing I have hereto set my hand thisthirtieth day of December,(1929.

MICHAEL D. AISENSTEIN.

